CN110026281B - Method and device for removing heat insulation layer of engine shell - Google Patents
Method and device for removing heat insulation layer of engine shell Download PDFInfo
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- CN110026281B CN110026281B CN201910212499.5A CN201910212499A CN110026281B CN 110026281 B CN110026281 B CN 110026281B CN 201910212499 A CN201910212499 A CN 201910212499A CN 110026281 B CN110026281 B CN 110026281B
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- spray head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
- B02C19/061—Jet mills of the cylindrical type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
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- Manufacture Of Motors, Generators (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method and a device for removing a heat insulating layer of an engine shell, and the method comprises the steps of cutting the heat insulating layer by adopting a first liquid flow vertical to the engine shell, and stripping the cut heat insulating layer by adopting a second liquid flow forming an included angle of 0-60 degrees with the engine shell; the diameter of the first liquid flow is 0.2-0.4 mm, the pressure of the first liquid flow is 220-300 MPa, and the diameter and the pressure of the second liquid flow are the same as those of the first liquid flow. Because the heat insulating layer hardness is big, this device adopts high-pressure water column to carry out the breakage to the heat insulating layer, guarantees that the heat insulating layer separates with the engine casing under the high-pressure completely, and the casing inner wall after the washing possesses the requirement of adhering to the heat insulating layer once more, guarantees that the engine metal casing is indeformable, can retrieve and recycle.
Description
Technical Field
The invention belongs to the technical field of post-treatment, and relates to a method and a device for removing a heat insulation layer of an engine shell.
Background
After the rocket motor is operated, the shell of the rocket motor is high in value and often needs to be recycled, so that the heat insulation layer attached to the shell needs to be removed.
The removal of the thermal insulation layer is currently done manually. Because the hardness of the heat insulating layer is high, the dust particles are fine, and the dust is large when the heat insulating layer is manually removed, perfect protective equipment is needed. And when the manual work is got rid of, it is inefficient, handle a casing, can only accomplish in the time of 1 ~ 2 days. Meanwhile, the pressure during manual removal is unstable, and the engine shell is easy to deform and scrap.
Disclosure of Invention
In order to fill the blank of the prior art, the invention aims to provide a method and a device for removing a heat insulation layer of an engine shell, which can quickly and accurately remove the heat insulation layer on the engine shell without damaging the engine shell.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
a method for removing a heat insulation layer of an engine shell comprises the steps of cutting the heat insulation layer by adopting a first liquid flow perpendicular to the engine shell, and peeling the cut heat insulation layer by adopting a second liquid flow forming an included angle of 0-60 degrees with the engine shell;
the diameter of the first liquid flow is 0.2-0.4 mm, the pressure of the first liquid flow is 220-300 MPa, and the diameter and the pressure of the second liquid flow are the same as those of the first liquid flow.
A method for removing a heat insulating layer of an engine shell comprises the steps of cutting the heat insulating layer by adopting a first liquid flow perpendicular to the engine shell, and peeling the heat insulating layer after cutting by adopting a second liquid flow forming an included angle of 15 degrees with the engine shell;
the diameter of the first liquid flow is 0.25mm, the pressure of the first liquid flow is 220-300 MPa, and the diameter and the pressure of the second liquid flow are the same as those of the first liquid flow;
the first liquid stream was centered at a distance of 20mm from the second liquid stream.
Optionally, the engine shell axially rotates while removing the heat insulation layer, and the rotating speed of the axial rotation is 10-60 rpm;
the first liquid flow and the second liquid flow also advance along the axial direction when cutting and stripping are carried out, and the speed of the axial advance is 0.1-1 mm/s.
Optionally, the engine housing axially rotates while removing the heat insulation layer, and the rotating speed of the axial rotation is 30 rpm;
the first and second liquid flows also travel in the axial direction when cutting and peeling are performed, and the speed of the axial travel is 0.5 mm/s.
The invention provides a device for removing a heat insulating layer of an engine shell, which removes the heat insulating layer of the engine shell by adopting the method.
Optionally, the spray head assembly comprises a spray pipe, a first spray head is arranged in the vertical direction and communicated with the spray pipe, and a second spray head is arranged in the direction facing the first spray head and communicated with the spray pipe and forms an angle of 0-60 degrees with the spray pipe;
the diameters of the first spray head and the second spray head are both 0.2-0.4 mm;
the center distance between the first spray head and the second spray head is 20 mm.
Optionally, the treatment device further comprises a workbench, wherein a rotary supporting member and a supporting and adjusting member are arranged on the workbench, and the supporting and adjusting member supports and adjusts the axial position of the engine shell to be treated in the axial direction; the rotary support member provides axial rotary power at the end of the engine housing to be treated.
Optionally, the rotary support member includes a bracket disposed on the workbench, and a rotary motor and a rotary force-transmitting frame are sequentially disposed on the bracket along an axial direction;
the support adjusting component comprises an arc-shaped support frame, and the support frame is arranged on a slide rail of the workbench in a sliding mode.
Optionally, the treatment device further comprises a spray head position adjusting component, wherein the spray head assembly is suspended in the shell of the engine to be treated by the spray head position adjusting component;
the nozzle position adjusting member includes an X-axis driving mechanism, a Y-axis driving mechanism, and a Z-axis driving mechanism.
Optionally, a concave recovery box is arranged on the workbench at a position corresponding to the supporting and adjusting member; the device also comprises a liquid pressurizing assembly and an electric control console; the liquid pressurizing assembly comprises a pressurizing pipe and a pressurizing station, and the pressurizing pipe is communicated with a spray pipe of the spray head assembly.
The invention has the beneficial effects that:
because the heat insulating layer of the engine shell has high hardness, the high-pressure liquid column is adopted to crush the heat insulating layer, the heat insulating layer is ensured to be completely separated from the engine shell under high pressure, the inner wall of the treated shell has the requirement of re-attaching the heat insulating layer, the metal shell of the engine is ensured not to deform, and the treated engine shell can meet the requirement of re-recycling.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a block diagram of an engine casing insulation removal apparatus of the present invention;
FIG. 2 is a schematic view of the installed position of the sprinkler assembly of FIG. 1;
FIG. 3 is a comparison of before and after removal of the engine housing during removal;
FIG. 4 is a photograph of the inner wall of the engine case after removal is completed;
FIG. 5 is a photograph showing the removal of the insulating layer after cutting off the insulating layer into a stripe-shaped residue and a powdery residue;
the reference numerals in the figures denote: 1-spray head component, 11-spray pipe, 12-first spray head, 13-second spray head, 2-workbench, 3-rotary supporting component, 31-bracket, 32-rotary force transmission frame and 33-rotary motor; 4-supporting an adjusting component, 41-supporting frames and 42-sliding rails; 5-recovery box, 6-spray head position adjusting component, 61-X axis driving mechanism, 62-Y axis driving mechanism, 63-Z axis driving mechanism, 7-engine shell, 8-liquid pressurizing component, 81-pressurizing pipe, 82-pressurizing station and 9-electric control console.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise specified, use of the directional terms "upper" and "lower" generally refer to the definition in the drawing figures of the accompanying drawings, and "inner" and "outer" refer to the inner and outer of the contours of the corresponding parts.
The engine shell is particularly a solid fuel rocket engine shell, and the heat insulation layer on the solid fuel rocket engine shell is an ablation-resistant heat insulation layer with a certain thickness, which is adhered to the inner wall of the solid rocket engine combustion chamber shell; the solid engine heat insulation layer is used as the lining of the combustion chamber, protects the engine shell from being overheated and weakened, and plays a role in air tightness for the composite material shell. The general heat insulating layer is made of nitrile rubber, ethylene propylene diene monomer rubber, silicon rubber and other materials, and the outer reinforcing body is made of ablation-resistant filler. The thickness of the heat insulating layer is usually 1 to 5 mm.
In the embodiment of the invention, the method for removing the heat-insulating layer of the engine shell comprises the steps of cutting the heat-insulating layer by adopting a first liquid flow perpendicular to the engine shell, and stripping the heat-insulating layer after cutting by adopting a second liquid flow forming an included angle of 0-60 degrees with the engine shell; the diameter of the first liquid flow is 0.2-0.4 mm, the pressure of the first liquid flow is 220-300 MPa, and the diameter and the pressure of the second liquid flow are the same as those of the first liquid flow. The method can cleanly remove the heat insulating layer of the engine shell, and adopts high-pressure liquid flow to crush the heat insulating layer, so as to ensure that the heat insulating layer is completely separated from the engine shell under high pressure, the inner wall of the treated shell has the requirement of re-attaching the heat insulating layer, and simultaneously, the treated metal shell of the engine cannot deform, so that the requirement of recycling is met.
In an embodiment of the present disclosure, an optimal removal process is: cutting the heat insulation layer by adopting a first liquid flow vertical to the engine shell, and stripping the cut heat insulation layer by adopting a second liquid flow forming an included angle of 15 degrees with the engine shell; the diameter of the first liquid stream was 0.25mm, the pressure of the first liquid stream was 220MPa, and the diameter and pressure of the second liquid stream were the same as those of the first liquid stream; the first liquid stream was centered at a distance of 2mm from the second liquid stream.
In the embodiment of the disclosure, the engine shell axially rotates while removing the heat insulation layer, and the rotating speed of the axial rotation is 10-60 rpm; the first liquid flow and the second liquid flow also advance along the axial direction when cutting and stripping are carried out, and the speed of the axial advance is 0.1-1 mm/s. The rotating speed of the engine shell to be treated is matched with the axial advancing speed of the liquid flow, so that a faster treatment effect is realized, the heat insulation layer on the shell is ensured to be removed more thoroughly, and the extremely-small residual large working speed is achieved.
In the embodiment of the present disclosure, a preferable scheme is: the engine shell also rotates axially while removing the heat insulation layer, and the rotating speed of the axial rotation is 30 rpm; the first and second liquid streams also traveled in the axial direction while cutting and peeling were performed, the speed of the axial travel being 0.5 mm/s. The rotating speed of the engine shell to be treated is matched with the axial advancing speed of the liquid flow, the fastest treatment effect is achieved, meanwhile, the heat insulation layer on the shell is guaranteed to be removed more thoroughly, and the maximum working speed of extremely small amount of residues is achieved.
The invention also provides a device for removing the heat insulating layer of the engine shell, and the device for removing the heat insulating layer of the engine shell removes the heat insulating layer of the engine shell by adopting the method for removing the heat insulating layer of the engine shell. The device adopts the spray head with small flow and low pressure to clean, the flow rate of the cleaning water is less than 4L/min, and the metal shell is not deformed while the heat insulation layer is cleaned. The cleaning speed of the device reaches 0.5m2~1m2H is used as the reference value. Through contrast test, adopt this device and manual work to clear up the product of same model, the manual work needs 2 people 8h to accomplish, and this device only needs 1h to accomplish. The cleaning process of the device is completed in a full-automatic mode, manual participation is not needed in the cleaning process, and the cleaning water is free of chemical pollution, so that environmental protection and personnel protection are not needed, and environmental and manual safety is guaranteed.
With reference to fig. 1 and 2, in particular, the device for removing the heat insulation layer of the engine housing comprises a spray head assembly 1, wherein the spray head assembly 1 comprises a spray pipe 11, a first spray head 12 communicated with the spray pipe 11 is arranged in the vertical direction, and a second spray head 13 communicated with the spray pipe 11 and arranged at an angle of 0-60 degrees with the spray pipe 11 in the direction facing the first spray head 12; the diameters of the first spray head 12 and the second spray head 13 are both 0.2-0.4 mm; the first spray head 12 and the second spray head 13 are spaced apart from each other at a center distance of 20 mm. The method for removing the heat insulating layer of the engine shell is realized.
In the embodiment of the present disclosure, the device further comprises a workbench 2, wherein a rotary supporting member 3 and a supporting and adjusting member 4 are arranged on the workbench 2, and the supporting and adjusting member 4 supports and adjusts the axial position of an engine shell 7 to be processed in the axial direction; the rotary support member 3 provides the power of axial rotation at the end of the engine casing 7 to be treated.
In the embodiment of the present disclosure, the rotary support member 3 includes a bracket 31 provided on the table 2, and a rotary motor 33 and a rotary force-transmitting bracket 32 are provided on the bracket 31 in this order in the axial direction; the drive mechanism of the rotating electric machine 33 is of the type: SV-DB100-0R 2-2-1R; rotatory biography power frame 32 is the structure that the body of rod and loop forming element are constituteed, be connected through fixed and pending engine case 7 of loop forming element, the body of rod transmits the rotatory moment of torsion of rotating electrical machines 33 for engine case 7, support adjusting member 4 includes curved support frame 41, support frame 41 only supports engine case 7 in the axial, do not hinder engine case 7's rotation, support frame 41 slides and sets up on workstation 2's slide rail 42, can carry out axial position's regulation.
In the embodiment of the present disclosure, a spray head position adjusting member 6 is further included, and the spray head position adjusting member 6 suspends the spray head assembly 1 in an engine housing 7 to be treated; the head position adjustment member 6 includes an X-axis drive mechanism 61, a Y-axis drive mechanism 62, and a Z-axis drive mechanism 63. The driving mechanism of the three shafts consists of a servo motor and a lead screw module. The type of the servo motor is as follows: SV-DB100-0R2-2-1R, the model of lead screw module is: HK 85-F0.
In the embodiment of the present disclosure, the work table 2 is provided with a recessed recovery box 5 at a position corresponding to the support regulating member 4 for recovering the removed waste of the heat insulating layer.
In the embodiment of the present disclosure, the liquid pressurizing assembly 8 and the electronic control console 9 are further included; liquid pressurization assembly 8 includes a pressurization duct 81 and a pressurization station 82, pressurization duct 81 communicating with spout 11 of spray head assembly 1. The CPU model of the console 9 may be AM3352BZCZD60 for powering and operating control of the device.
The first embodiment is as follows:
referring to fig. 1 and 2, the device for removing the heat insulating layer of the engine case comprises a spray head assembly 1 and a workbench 2, wherein a rotary supporting member 3 and a supporting adjusting member 4 are arranged on the workbench 2, and a concave recycling box 5 is arranged on the workbench 2 at a position corresponding to the supporting adjusting member 4 and is used for recycling the waste material of the removed heat insulating layer. The device also comprises a spray head position adjusting component 6, a liquid pressurizing assembly 8 and an electric control platform 9; liquid pressurization assembly 8 includes a pressurization duct 81 and a pressurization station 82, pressurization duct 81 communicating with spout 11 of spray head assembly 1. The electric console 9 has a CPU model of AM3352BZCZD60, and the booster station 82 has a model of 3742.
The spray head assembly 1 comprises a spray pipe 11, a first spray head 12 communicated with the spray pipe 11 and arranged in the vertical direction, and a second spray head 13 communicated with the spray pipe 11 and arranged at an angle of 15 degrees with the spray pipe 11 in the direction facing the first spray head 12; the nozzle diameters of the first spray head 12 and the second spray head 13 are both 0.25 mm. The rotary supporting member 3 comprises a bracket 31 arranged on the workbench 2, and a rotary motor 33 and a rotary force transmission frame 32 are sequentially arranged on the bracket 31 along the axial direction; the drive mechanism of the rotating electric machine 33 is of the type: SV-DB100-0R 2-2-1R; rotatory biography power frame 32 is the structure that the body of rod and loop forming element are constituteed, be connected through fixed and pending engine case 7 of loop forming element, the body of rod transmits the rotatory moment of torsion of rotating electrical machines 33 for engine case 7, supports adjusting part 4 and includes curved support frame 41, and support frame 41 only supports engine case 7 in the axial, does not hinder engine case 7's rotation, and support frame 41 slides and sets up on slide rail 42, can carry out axial position's regulation.
The spray head position adjusting component 6 suspends the spray head assembly 1 in an engine shell 7 to be treated; the head position adjusting member 6 includes an X-axis driving mechanism 61, a Y-axis driving mechanism 62, and a Z-axis driving mechanism 63; the driving mechanism of the three shafts consists of a servo motor and a lead screw module. The type of the servo motor is as follows: SV-DB100-0R2-2-1R, the model of lead screw module is: HK 85-F0.
The process conditions for the removal of the insulation layer of the engine casing to be treated with the above-described device are shown in table 1:
TABLE 1
Booster station pressure setting | 220MPa |
Number of |
2 are provided with |
Diameter of nozzle outlet | 0.25mm |
First nozzle water outlet angle | 0° |
Second nozzle outlet angle | 15° |
Center distance of first liquid flow and second liquid flow | 2mm |
Rotational speed of engine casing to be treated | 30rpm |
Distance between water outlet of nozzle and heat insulating layer | 10mm |
Axial travelling speed of spray head | 0.5mm/s |
The engine parameters used in this experiment are shown in table 2:
TABLE 2
Tested engine shell | Φ=200mm,L=800mm |
Material for heat insulation layer of tested engine shell | Ethylene propylene diene monomer |
Thickness of heat insulation layer of tested engine housing | 3mm |
The test steps are as follows:
(1) setting parameters: the distance between the water outlet of the spray head and the heat insulation layer is 10mm, the rotating speed of the shell of the engine to be processed is 30rmp, and the water outlet pressure of the booster station is set to be 220 MPA;
(2) the method comprises the following operation steps: the booster station was started, and the removal conditions in table 1 were set on the electronic console to start removal.
(3) And in the working process, after the water jet vertically downwards starts to spray, the spray head moves back and forth along the axial direction at the speed of 0.5mm/s to remove the heat insulation layer, and the device is closed after the removal is finished.
Fig. 3 is a photograph of a pause in removal, with the thermal insulation layer to be removed on the left and the inner wall of the engine case after peeling off the thermal insulation layer after removal on the right. The middle curve is the insulation layer removal boundary with a thickness of 3 mm. The removal effect is good, and the residual quantity of the heat insulation layer is small.
Fig. 4 is a photograph of the inner wall of the engine case after the removal, indicating that the removal effect is good and the heat insulating layer remains little.
FIG. 5 shows the photo insulation layer on the inner wall of the engine case after the removal is completed, and the photo insulation layer is cut off into strip-shaped residues and powder-shaped residues, wherein the strip-shaped residues are most.
The time taken for this test was 1 hour.
Therefore, the method and the device for removing the heat insulating layer of the engine shell have the advantages of short time (only 1 hour is needed), good removing effect, no residual heat insulating layer of the shell and ensured shape integrity of the shell.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (2)
1. A method for removing a heat insulating layer of an engine shell is characterized by comprising the steps of cutting the heat insulating layer by adopting a first liquid flow perpendicular to the engine shell, and stripping the cut heat insulating layer by adopting a second liquid flow forming an included angle of 15 degrees with the engine shell;
the diameter of the first liquid flow is 0.25mm, the pressure of the first liquid flow is 220-300 MPa, and the diameter and the pressure of the second liquid flow are the same as those of the first liquid flow;
the first liquid stream is centered at a distance of 20mm from the second liquid stream;
the engine shell axially rotates while removing the heat insulation layer, and the rotating speed of the axial rotation is 30 rpm;
the first and second liquid flows also travel in the axial direction when cutting and peeling are performed, and the speed of the axial travel is 0.5 mm/s.
2. An engine casing insulation removal device, characterized in that the engine casing insulation removal device removes the engine casing insulation by the method of claim 1;
the spray head assembly (1) comprises a spray pipe (11), a first spray head (12) is communicated with the spray pipe (11) in the vertical direction, and a second spray head (13) is communicated with the spray pipe (11) and is arranged at an angle of 0-60 degrees with the spray pipe (11) in the direction facing the first spray head (12);
the diameters of the first spray head (12) and the second spray head (13) are both 0.2-0.4 mm;
the center distance between the first spray head (12) and the second spray head (13) is 20 mm;
the device is characterized by also comprising a workbench (2), wherein a rotary supporting member (3) and a supporting and adjusting member (4) are arranged on the workbench (2), and the supporting and adjusting member (4) supports and adjusts the axial position of the engine shell to be processed in the axial direction; the rotary supporting member (3) provides axial rotary power at the end of the engine shell to be treated;
the rotary supporting component (3) comprises a bracket (31) arranged on the workbench (2), and a rotary motor (33) and a rotary force transmission frame (32) are sequentially arranged on the bracket (31) along the axial direction; the support adjusting component (4) comprises an arc-shaped support frame (41), and the support frame (41) is arranged on a slide rail (42) of the workbench (2) in a sliding manner;
the device also comprises a spray head position adjusting component (6), wherein the spray head component (1) is suspended in the shell of the engine to be treated by the spray head position adjusting component (6); the spray head position adjusting component (6) comprises an X-axis driving mechanism (61), a Y-axis driving mechanism (62) and a Z-axis driving mechanism (63);
a concave recovery box (5) is arranged on the workbench (2) at a position corresponding to the supporting and adjusting component (4);
the device also comprises a liquid pressurizing assembly (8) and an electric control platform (9); the liquid pressurizing assembly (8) comprises a pressurizing pipe (81) and a pressurizing station (82), and the pressurizing pipe (81) is communicated with the spray pipe (11) of the spray head assembly (1).
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